Driving attachment for talking-machines.



E. G. LEFEVER.

DRIVING ATTACHMENT FOR TALKING MACHINES.

APPLICATION FILED AUG. 1. I917.

1,271,590. v Patentd July 9, 1918.

EDEN G. LEFEVEB, IBOYERTOWN, PENNSYLVANIA.

DRIVING ATTACHMENT FOR TALKIKG-MAC HINES.

Specification of Letters Patent.

Patented July a, 1918.

Application filed August 1, 1917. serial No. 183,909.

To all whom it may concern:

Be it known that I, EDEN G. LEFEVER, a citizen of the United States,residing at Boyertown, Berks county, State of Penns lvania, haveinvented certain new and use 1 Improvements in Driving Attachments'forTalking-Machines, of which the following is a specification.

This invention. relates to a driving attachment for talking machines andmore particularly to a self-contained device which may be easily appliedto present machines. The

Jects radially outside of the periphery of objects of the invention areto provide a simple attachment for driving ta king machines which can bemanufactured at a small cost and can be applied to present machineswithout making any substantial changes therein. from the descriptiontaken in connection with the drawings, inwhich,

Figure 1 is a fragmentary plan view of the top of a talking machineshowing the attachment, the turn table being shown in dotted lines;

Fi 2 is a sectional elevation taken substantlally on the line 22 of Fig.1;

Fig. 3 is a view similar'to Fig. 2 showing another form ofthe invention;Fi 4 is asectional elevation taken substantlally on the line 44 of Fig.1.

Referringto Fig. .1, it wilLbe noticed that, the different parts of thedriving attachment are mounted on a plate 10, which may be of anydesired outline, but preferably is of the sha e shown in this figure,that is, it consists su stantially of two arms 11 and 12 arranged atright angles to each other. At the corner formed by the outside meetingedges of the two arms the plate is formed with an opening 13 which isadapted to take over the top of the usual spindle or center pin 14 ofthe talking machine. As the space between the stationary top table 15and the turn-table 16 of most machines is not suflicient for my drivingattachment, it is necessary to provide means for mounting the turn-tableat a higher elevation above the stationary table 15. For this purpose, ablock 17 is secured to the plate aroun the opening 13 by any desiredmeans, such as the rivets 18. The bottom of this block is formed with acentral recess 19 adapted to receive the top of the'spindle 14. The topof the block is provided with a central substantially frusto-conical proection 20, which is adapted to extend into the Other objects will beapparent.

conical bore of the turn-table 16. Around the base of this projection 20the block is formed with a raceway 21 which is provided with the balls22 which by engagement with the lower edge of the hub 23 of theturntable are adapted to form an.antifriction means for rotatablysupporting the latter.

The top of the projection 20 is provided with the usual centering pin21v whichis adapted to position the record disks on the turntable in theusual manner.

The end of the arm 11 of the plate pro- I the turn-table and ma beformed with three tabs 24, 25 and 26 whlch are struck up from the saidplate, these tabs being arranged to receive between them the base 27 ofan electric motor 28, to thereby secure the motor to the plate. Arrangedin a radial direction with respect to the bearing 17 is a shaft 29 whichat one end is connected to the motor 28 and at the other end as at 30 issupported on the bearing block 17 At the end near the motor the shaftmay be supported in a bearing formed in an upright 30'- which may bestruck up from the plate 10. A substantially frusto-conical member 31formed with exterior threads is mounted on the shaft 29 'to rotatetherewith and slide therealong.

.the member 31. As the outer surface of this ring wears the diameter maybe increased and made of the desired size by screwing up-the ring 33 onthe conical member 31. This will expand the ring so that it will bereturned to its original diameter. The member 31 at one end is formedwith a channel 34 in which is mounted an actuating ring 35. This ring isshown in side elevation in Fig. 4 and it will be observed that itconsists of a strip or barthat is bent to form a ring portion which isarranged in the groove 34 and has an arm or foot 36 which is adapted tobear and slide on the plate 10, to thereby prevent rotation of the ring35 due to the friction between it and the member 31. The arm 36 isspaced from the other end of the ring 35 afid one end of the link 37 ispivoted on a pin 38 and mounted between said arm and end. A lever 39 ispivoted as at 40 on the plate 10 and has one end shaped to form apointer and movable over a scale 4-1 at the periphery of the arm 12 andjust outside of the turn-table 16. The opposite end of this lever 39 ispivotally connected.

with the link 37, the arrangement of the parts being such that when theouter end of lever 39 is moved the friction roller will be caused toslide on the shaft 29 to thereby vary the speed of rotation of theturn-table 16. It is thus apparent that the parts just describedconstitute a means for controlling the angular velocity of theturn-table.

Fig. 3 illustrates another form of the invention in which the turn-tableis not moved to a new position above its normal position but remains onthe spindle Mi -of the machine. In order to arrange the parts in thismanner it is necessary to form the plate 10, which is similar to theplate 10 in the other form, with a depressed portion 45 which provides amounting for the motor- 28. The depressed portion 45 may he formed withtabs'25 and 26 as in the other form, but the arrangement is such thatthe shaft 29 may be arranged in the space between the stationary table15 and the turntable 16, In mounting this plate 10' on the machine it istherefore necessary to out out a portion of the stationary table 15" toprovide an opening46 for the depressed portion 45 of the plate. Thisdepression is just deepenough so that the axis of the motor will alinewith the axis of the shaft 29, Around the opening 13 of the plate araceway 47 is mounted and carries a series of balls 48 on which the ring49' bears, the

latter member being adapted to support the table 16' so that its hub 50occupies the usual position on the top of the s indie 14..

p The centering pin 51 at the top 0 the spindle projects above theturn-table in the usual. manner. If desired, the plate may have aportion bent up to form a bearing 52 for the inner end of the shaft 29'and likewise another portion may be bent up to form a bearing 53 for thesaid shaft at a point adjacent to the motor. Mounted on the shaft 29 isthe conical member 31' with the rubber ring 33 of the same constructionas described in connection with the other form.

necessary to remove the turn-table and cut the opening 46 in thestationary table-15 and then the plate with the attachment may be placedin position and the'turn-table remounted on the spindle 14. It istherefore obvious that I have provided a very simple driving attachmentfor talking machines which can be applied very easily and quickly topresent machines and is so simple that it can be manufactured verycheaply. Although specific forms of the invention have been described itis obvious that many of the details may be varied without departing fromthe spirit of the invention Having thus described the invention, whatisclaimed and desired to be secured by Letters Patent is:

1. A; self-contained driving attachment for talking machines comprising.a plate formed with an. opening adapted to take over the center pin of atalking machine, a

. motor carried by said plate, means for driving the turn-table from themotor, and means mounted on the plate for controlling the angularvelocity of: the turn-table.

2. A self-contained driving attachment for talking machines comprising aplate formed with an opening adapted to takeover the center pin of atalking machine,

said plate also having a bearing for the turn-table a motor, connectionsbetween the motor and turn-table for driving the latter, and means forcontrolling the angular velocity of the turn-table.

3. A self-contained driving attachment for talking machines comprising aplate formed. with an opening adapted to take over the center pin of a*talking machine, said plate also having a bearing for themotor andturn-table for driving the latter, said connections including a shaftextendin radially from said bearing and carrying a 'ction. roller. s

4.. A self-contained drivin attachment for talking machines comprising aplate formed with an opening adapted to take over the center pin of atalking machine, said plate also having a bearing for the turn-table, amotor, connectlons between the motor and turn-table for driving thelatter,-

said connections including a shaftextending radially from said bearingand carrying a friction roller splined thereto for rotation therewithand sliding movement'thereon.

5. A self-contained drivingv attachment for talking machines comprisinga plate formed with an openingadapted to take over the center pin ofavtalking machine, said plate also having a bearing for the turn-table,a motor, connections between the motor and turntable for drivin thelatter, said connections including a she extending radially from saidbearing and carrying a friction roller splined thereto for rotationtherewith and sliding movement thereon, and means for sliding the rolleralong the shaft.

turn-table, a motor, coimections between the 6. A self-contained drivingattachment for talking machines comprising a plate formed with anopening adapted to take over the centerpin of a talking machine, saidplate also having a' bearing for the turn-table, a motor, connectionsbetween the motor and turn-table for driving the latter, saidconnections including a shaft extable. 7. A self-contained drivingattachment tending radially from said bearing and having one end mountedthereon, and means for controlling the angular velocity of the tumfortalking machines comprising a plate formed with an opening adapted totake over the center pin of a talking machine, said plate also having abearing for the turn-table, a motor, connections between the motor andturn-table for driving the latter, said connections including a shaftextending radially from said bearing and carrying a friction roller,said roller consisting of afrusto-conical member exteriorly threaded anda rubber rin thereon.

In testimony whereof I a my signature. EDEN G. LEFEVER.

